Machine for forming barrel clips



H. ANDERSON MACHINE FOR FORMING BARREL CLIPS April 29 1924.

1 Filed Nov. 13. 1922 4 Sheets-Sheet 1 so M I/vvE/WDR: HELME ANDERSON BY ina 5M1 ATTORNEYS.

Aprii 29, 1924:.

- H. ANDERSON MACHINE FOR FORMING BARREL CLIPS Filed Nov. 13. 1922 4 Sheets-Sheet 2 April 29, 1924.

H. ANDERSON MACHINE FOR FORMING BARREL CLIPS 4 Sheets-Sheet 3 Filed Nov. 13 J 1922 Fig-6 R a .Y MM 5 Mm Iwfl w M E M Y 5 April 29, 19240 H. ANDERSON MACHINE FOR FORMING BARREL CLIPS Filed Nov. 13

1922 4 Sheets-'Sheet 4 glvvc NToR: HEL ER NDERSON.

ATTORNEYS.

Patented Apr. 29, 1924.

UNITED STATES HELMER ANDERSON, OF MINNEAPOLIS,

MINNESOTA, ASSIGNOR 'IO WASHBURN- PAT CROSBY COMPANY, OFMINNEAPOLI-S, MINNESOTA, A CORPORATION;

MACHINE FOR FORMING BARREL CLIPS.

Application filed November 13, 1922. Serial No. 600,617.

To all whom it may concern:

Be it known that I, HELMER ANDERSON,

a citizen of the United States, residing at Minneapolis, in the'county of Hennepin and ,5 State of Minnesota, have invented. certain new and useful Improvements in Machines for Forming Barrel Clips, of which the following is a specification.

My invention relates to machines for 10 forming'barrel clips,.and an object is-to providea machine in which such clips will be formed from strips of metal by the action of a movable die and a plunger which coact with a stationary die. Another object is to provide a machine having means for cutting off the proper length for the clip from the strip of metal when the strip has been fed between the dies.

The full objects and advantages of my invention will appear in connection with the detailed description, and the novel features embodied in my inventive idea will be particularly pointed out in the claims.

In the accompanying drawings, Figure 1 is atop plan View of. my machine showing the die in open position. Fig. 2 is a verticalseotion on the line 2 2'0f Fig. 1. Fig. 3 is a fragmentary plan view showing. the movable die operated. Fig.4 is a plan'view showing the movable die and the plunger operated. Fig. 5 is a fragmentary view corresponding to Fig. 2butshowing theparts in clutched position. Fig. 6 is a-side'elevational View with a small portion in'section. Fig. 7' is a view in vertical section onthe line.77 of Fig. 4. Fig. 8 is a view in vertical section onthe line 8-8 of Fig. 4. Fig. 9 is a view showing the development of a cam. Fig. 10 is a sectional View of the clip on theline 1010 of Fig. 11. Fig. 11 is a plan view of the clip. As shown in the drawings, the machine includes a frame or bed 12 supportedv on legs 14. A shaft 16 mounted in bearings onthe bed has a driving pulley 18 loosely mounted on one end thereof. This driving; pulley is caused to impart rotationto the shaft 16 by a one revolution clutch, which in the em bodiment shown is constructed as follows: Keyed on the shaft 16 adjacent the driving pulley is a collar 20 in which a clutch bolt 22 is slidably mounted. This bolt is backed up by a spring 24 which when free to act forces the bolt into a hole 26-formed in a ring 28 secured to the hub of the pulley.

The head of thebolt 22 has a downward projection 30 with which a wedge member 32 normally engages so as to hold the bolt retracted against the tension of the spring 24. The wedge member 32 is formed on the end of an arm 34 pivotally mounted on a bracket 36 with which the frame o'f the machine is provided. Attached to the arm 34 are toggle links 38 and 40, the latter of which is pivoted to a projection 42 carried by one of the legs as shown in Fig. 2. By referring to F ig. 6, it will be seen that a block 44 is attached to-the common joint of the two toggle links and a spring 46 connects one end of thisblock with a downward extension 48 from the bracket 36-and tends to hold the toggle links in alinement so that the wedge 32 will be held in upward position for retracting the bolt 22. Secured to the other end of the block 44 is a cable 50 which passes over a roller 52 and has itslower end secured to a foot lever 54 upon depression of which the wedge 32 is lowered out of engagement with the head30 of the bolt 22, thereby permitting'the spring. 24 to force the bolt into the hole 26 whereby the shaft 16 is caused to rotate. If the foot of the operator is immediately removed from the foot lever the shaft 16 will make one rotation and will then stop, otherwise it will continue to rotate as long as the foot lever is depressed. Secured to the upper surface of the frame of the machine is a stationary die 56 which at one end has a cutting edge 58 and at the other end has an outwardly'inclined finger 60. The portion. of thisdie'between the cutting edge 58 and the finger 60 is indented and provided with aprojection 62. Movable in slideways in the frame is a slide 64 which, as best shown in Fig. 8, is dovetailed to fit in correspondingly shaped slideways, one, of which designated 66 is adjustable by means of two sets ofbolts 68 and 70 in order to'take up wear. -The slide 64 is recessed to receive die 7 2 which, as shown in Fig. 7, is adjustably held by bolts 74 which pass through holes in the die larger than the stems of the bolts. This die is backed up by an ad justable bolt 76 and is provided with a shearing finger 78 on one side adapted to cooperate with the cutting edge 58 and is provided with a bending finger 80 on the other side. Between these fingers, the face of this movable die is shaped to correspond wi'ththe' the dies are entirely closed.

face of the stationary die 56. A cam 82 secured to the shaft 16 serves to advance the die 72 by engaging a roller 8 1 mounted on the rear endof the slide 64:. A spring 86 interposed between a shoulder on the machine frame or support and a projection on the rear of the slide serves to retract the latter and keep the roller 84; in engagement with the cam 82. It will be observed that the cam surface of this cam is so constructed as to provide a dwell. Secured to the end of the shaft 16 is a second cam 88 which consists of a disk having the projecting cam surface extending for only a limited portion of its circumference. The cam88 engages a roller 90' mounted on one end of an arm 92 the other end of which is pivoted on a vertical bolt 9 1 secured to the support or frame as shown in Fig. 8. Underneath the arm 92 a second arm 96 is pivoted intermediate its ends on the bolt 91 and one end of this second arm is inclined upwardly as shown in Fig. 7 and provided with a set screw 98 which engages an intermediate portion of the arm 92. The other end of the arm 96 is provided with a roller 100 which engages the outer end of a plunger 102 which has an inner wedge-shaped end 104 adapted to cooperate with one side of the finger 60 as will be seen by referring to Fig. 4.. The plunger 102 is normally held retracted and the roller 90 kept in engagement with the cam 88 by springs 106 interposed between the head of the plunger and the machine support. Positioned beyond the fixed finger 60 is a stop 108 which limits theextent of'material which may be fed in between the dies.

The operation and advantages of my invention will now be obvious. A metal strip 8 from which the clips are to be formed is fed between the dies as shown in Fig. 1 with its inner end resting against the stop 108. The operator by stepping upon the foot lever 54 causes the shaft 16 to rotate and the cam 82 causes the movable die 72 to advance and squeeze the metal strip against the fixed die 56, thereby forming the body of the clip as shown in Fig. 3, the clip being cut off by the shearing finger 7 8 acting in conjunction with the cutting edge 58 before The finger 80 on the movable die bends the end portion of the clip partly around the fixed finger 60 as will be seen in Fig. 8. On account of the cam 82 having a dwell, the clip is firmly held between the dies while the plunger 102 is advanced by the cam 88. The wedgeshaped end 10 1 of the plunger engages the partly bent end portion of the clip and completes the bending of this portion around the finger 60 as shown in Fig. 1 to form the finger F best shown in Fig. 10. Continued rotation of the cams results in the movable die and the plunger being retracted by the springs when the latter are permitted to operate and the fully formed clip when released drops through an opening in the support of the machine as will be apparent from Fig. 7. By referring to Fig. 10, it will be seen that the clip thus formed has a finger portion F by, means of which the clip may be hung upon the upper end of a barrel with the body of the clip lying inside the barrel and with the projection P engaging in the customary groove in the inner sur face of the staves. The periphery of the barrel head engages in the depression D and the under side of the barrel head rests upon the offset portion It of the clip so that there is no liability of the barrel head being forced out of its proper position down into the barrel. In practice a number of the clips will be used for each barrel.

As will be apparent from Fig. 7, the raised portion of the cam 82 extends for a considerable portion of the circumference whereby this cam has a dwell which maintains the movable die 72 in pressing position for nearly one-half of the rotation of the cam. The cam 88, however, as will be apparent from Figs. 1 and 9 has only a very limited dwell at the highest portion of the cam so that the clip is quickly released from engagement by the plunger 102 after the bending operation performed by the latter has been completed.

I claim: 1

1. A machine for forming barrel clips comprising a support, a stationary die carried by said support, said die having an outwardly inclined finger and the face of said die being indented and provided with a short projection, a movable die shaped to correspond with said indented portion, a bending fingeron said movable die adapted to cooperate with said outwardly inclined finger, means for moving said movable die into pressing relation with said stationary die, a plunger arranged to reciprocate at an angle to said movable die to complete the bending of the end portion of the clip around said outwardly inclined finger, and means for reciprocating said plunger.

2. A machine for forming barrel clips comprising a support, a stationary die carried by said support, said die having a cutting edge on one end thereof, and an outwardly inc-lined finger on its other end a portion of the die between said cutting edge and said finger being indented and provided with a short projection, a movable die shaped to correspond with said indented portion, a shearing finger on said movable die adapted to cooperate with said cutting edge, a bending finger on said movable die adapted to cooperate with said outwardly inclined finger, means for moving said movable die into pressing engagement with said stationary die, a plunger arranged to re ciprocate at an angle to said movable die to complete the bendin of the end portion of the clip around sai outwardly inclined finger, and means for reciprocating said plunger.

3. A machine for forming barrel clips comprising a support, a stationary die carried by said support, said die having a cutting edge on one end thereof and an outwardly inclined finger on its other end, the portion of the die between said cutting edge and said finger being indented and provided with a short projection, a movable die shaped to correspond with said indented portion, a shearing finger on said movable die adapted to cooperate with said cutting edge, a bending finger on said movable die adapted to cooperate with said outwardly inclined finger, a cam for moving said movable die into pressing relation with said stationary die, said cam having a dwell which maintains said movable die in its pressing position, a plunger arranged to reciprocate at right angles to said movable die and having a wedgeshaped end adapted to cooperate with said outwardly inclined finger to complete the bending of the end port-ion of the clip around said inclined finger, and a cam for advancing said plunger while said movable die is held in its pressing posi- 'tion.

4. A machine for forming barrel clips comprising a support, a stationary die carried by said support, said die having an outwardly inclined finger at one end thereof, a movable die shaped to correspond with said stationary die, a cam for moving said movable die into pressing relation with said stationary die, said cam having a dwell which maintains said movable die in its pressing position, a plunger arranged to reciprocate at right angles to said movable die and having an end adapted to cooperate with said outwardly inclined finger to bend the end portion of the clip around said finger, a second cam, an arm pivoted at one end on said support and having its other end engaged by said second cam, a second arm pivoted intermediate its ends on the pivot of said first arm, one of the ends of said second arm carrying a set screw which engages an intermediate portion of said first arm and the other end engaging the head of said plunger, said second cam having a cam surface which causes said plunger tobe advanced while said movable die is held in its pressing position, and means which retract-s said plunger and keeps said first arm in engagement with said second cam.

In testimony whereof I hereunto aflix my signature.

HELMER ANDERSON. 

